Here is the full list of all 47 oath achievements.
The base game contains 17 achievements, and there is 1 DLC pack containing 30 achievements.
you beat all of the machines
you gathered all of the shards
you decided to sleep again
you caught all fish
you caught some junk...
you caught.. what?
you got yourself lost in the maze
you managed to get through the maze
you traded your way up
you are a super smooth talker
you... need to work on your social skills
interact with the odd plant
win on the.. "lucky" arcade machine
collect all the outfits
show off the familiar outfit to the person who gave it to you
beat the QuizScraper
eat the moss
become a deliverygirl
... a bad deliverygirl (hold onto it until the credits)
collect all the farming equipment
collect the maximum amount of seashells
button
???
beat the DLC
find the abnormally large coral
be seen
make it to the top of the left skyscraper
purchase and enjoy every meal
find a... familiar crystal while out swimming